English Vocabulary

English vocabulary is the stock of words and the phrases they travel in. Learning a word means knowing its form, the words it sits next to, and when it is too formal or too casual. Word building in English shows how one root becomes a family, and Numbers, dates, and times in English covers the words people need every day.

By Christopher Huntley. Updated

A word is more than a definition

A dictionary line is only the start. To use a word you need its part of speech, a typical partner ("make a decision", not "do a decision"), and whether it belongs in a meeting or with friends. "Purchase" and "buy" point at the same act. One is for a contract, the other for speech.

You needWhyExample
MeaningWhat it points at"delay" is a wait, not a cancel
FormNoun, verb, or adjective"decide", "decision", "decisive"
PartnersThe words beside it"make a decision", "heavy delay"
RegisterHow formal it is"buy" in speech, "purchase" in a form

Words also come in sets. If you know "arrive", "depart", and "delay", you can talk about travel. Isolated words from a random list are harder to recall because nothing in the sentence calls them up.

Families and everyday topics

English builds many words from a smaller set of roots, prefixes, and suffixes. Word building in English is that system: "happy" becomes "unhappy" and "happiness", and once you see the pattern you can guess words you have not studied. Guessing is not the same as knowing, so you still check the new word in a sentence.

Other words are learned by the situation, not by a root. Numbers, dates, and times in English is that kind of set: "on Monday", "at 7", "in March", "half past". The grammar is small and the words are used constantly, so they belong together.

She made a quick decision.
"Make" is the partner of "decision". "Do a decision" is not English.
The flight was delayed by an hour.
"Delay" here is a verb. The noun is "a delay".
The meeting is at 3 on Friday.
Clock time takes "at". A day takes "on".

Pairs that learners swap

A lot of vocabulary trouble is two words that are close, or a word used with the wrong partner. The sentence is grammatical and still wrong.

Not: I did a decision yesterday. Use: I made a decision yesterday. "Decision" takes "make", not "do".

Not: The class starts in Monday. Use: The class starts on Monday. Days take "on". "In" is for months, years, and parts of the day like "in the morning".

Not: He is a very success person. Use: He is a very successful person. "Success" is the noun. The adjective is "successful".

How to add words that stay

Ten words from one topic, each in a sentence you might actually say, stick better than fifty from a mixed list. Review the ones you missed, and notice the partner word each time, not only the translation.

When you meet a new word in something you are reading, write the whole phrase, not the word alone. "A heavy delay" will come back. "Delay" by itself may not.

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Frequently asked questions

How many English words do I need?

About two thousand word families cover most everyday conversation. Reading newspapers and novels takes more, and you add them from what you actually read.

Should I learn word lists?

Lists help when the words belong to one topic or one family. A random list of translations is easy to forget because no sentence calls the word back.

What is a word family?

A root plus the words built from it, such as "decide", "decision", "decisive", and "decisively". Learning the family is faster than learning each word as a stranger.

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